There are two ways to set up PHP to work with Apache 1.3.x
on Windows. One is to use the CGI binary (php.exe
for PHP 4 and php-cgi.exe for PHP 5),
the other is to use the Apache Module DLL. In either case
you need to edit your httpd.conf to configure Apache to
work with PHP, and then restart the server.

It is worth noting here that now the SAPI module has been
made more stable under Windows, we recommend it's use above
the CGI binary, since it is more transparent and secure.

Although there can be a few variations of configuring PHP
under Apache, these are simple enough to be used by the
newcomer. Please consult the Apache Documentation for further
configuration directives.

After changing the configuration file, remember to restart the server, for
example, NET STOP APACHE followed by
NET START APACHE, if you run Apache as a Windows
Service, or use your regular shortcuts.

Note: Remember that when adding
path values in the Apache configuration files on Windows, all backslashes
such as c:\directory\file.ext should be converted to
forward slashes: c:/directory/file.ext. A trailing
slash may also be necessary for directories.

Installing as an Apache module

You should add the following lines to your Apache httpd.conf file:

Example #1 PHP as an Apache 1.3.x module

This assumes PHP is installed to c:\php. Adjust the
path if this is not the case.

For PHP 4:

# Add to the end of the LoadModule section
# Don't forget to copy this file from the sapi directory!
LoadModule php4_module "C:/php/php4apache.dll"
# Add to the end of the AddModule section
AddModule mod_php4.c

For PHP 5:

# Add to the end of the LoadModule section
LoadModule php5_module "C:/php/php5apache.dll"
# Add to the end of the AddModule section
AddModule mod_php5.c

Note that the second line in the list above can be found
in the actual versions of httpd.conf, but it is commented out. Remember
also to substitute the c:/php/ for your actual path to
PHP.

Warning

A server deployed in CGI mode is open
to several possible vulnerabilities. Please read our
CGI security section to learn how to
defend yourself from such attacks.

If you would like to present PHP source files syntax highlighted, there
is no such convenient option as with the module version of PHP.
If you chose to configure Apache to use PHP as a CGI binary, you
will need to use the highlight_file() function. To
do this simply create a PHP script file and add this code:
<?php highlight_file('some_php_script.php'); ?>.